The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2001
Filed:
Jun. 29, 1999
Chang Hyuk Lee, Kyungki-Do, KR;
Jae Goan Jeong, Kyungki-Do, KR;
Hyundai Electronics Industries Co., Inc., Kyungki-Do, KR;
Abstract
A semiconductor device with an electrostatic discharge (ESD) protective circuit is disclosed. In this semiconductor device with an ESD protective circuit, an n-well guard ring is formed around an NMOS field transistor of a data input buffer or around an NMOS transistor of a data output buffer. The n-well guard ring is strapped to an n-well of a PMOS field transistor and to an n-well of a PMOS transistor, and thus a PNPN path is formed toward the PMOS transistor at a positive mode of the ground voltage. Therefore, the electrical resistance between the wells of the NMOS transistors and the PMOS transistors can be reduced, thereby improving the characteristics of the ESD protective circuit and a latch-up device. Further the layout area is reduced, and thus, the characteristics and the reliability of the semiconductor device are improved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile